Declassified footage shows how B-52 crews would conduct nuclear strikes during ... trends now

Declassified footage from 1960 revealed how the United States Air Force would perform nuclear strikes if needed amid the Cold War.

The video, Nuclear Effects During SAC Delivery Missions, released by The US National Archives and Records Administration on March 20 helped prepare bomber crews operating B-52s.

At the time, the aircrafts had nuclear missiles onboard that were ready to launch if the US was attacked by the Soviet Union.

The start of the 30-minute training video reads, 'Secret - To be Shown to Authorized Personnel ONLY,' which helped servicemen understand the effects of the weapons and how to safely return to their bases after deploying the missiles.

US officials released the video as Russian leaders warned of an 'apocalypse' if the West continues to send arms to Ukraine to help the country in its fight against invading forces.

The video walked through training exercises for bomber crews on board B-52. The crew would be informed of a mission but wouldn't know if it was a real quest or not until they reached their target.

Footage of crew members reviewing maps and targets showed as a narrator reassures the viewer the plans on how to conduct a nuclear strike had been extensively reviewed by experts in laboratories and in the field.

Perfecting time was essential for a precise testing procedure to ensure crew members were safe while in combat.  

The narrator explained the three effects of a nuclear attack in order, which include, blast, thermal and radiation.

These three effects are explained in detail while the narrator reviews what could happen during the different stages. 

To prepare bombers for the most ideal attack, the narrator

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